UNIVALVES TROCHUS. 143 



on tme side. The most prominent species are the T. 

 telescopium and the T. dolabratus. 



The T. conchyliophorus, T. imperialis, T. solans, T. 

 perspectivus, &c. are highly valued for their beauty and 

 rarity. 



The Trochus derives its name from the resemblance 

 of its species to the form of a top (rpo /oc). 



The Trochi are found in almost every part of the 

 world. 



Division 1. — Shell umbilicated, erect. 



Family 1. — With the pillar and umbilicus smooth. 



Scientific Name. Locality. Common Name. 



Niloticus Irid.Ocean,China, S. Seas Large marble T 



Conus East Indies, New Guinea Conic • • • • do 



Spinosus New Zealand Thorny • • • do 



Jujubinus Mauritius, West Lidies • • Mottled • • do 



Concavus Coromandel, N. Zealand Concave • • do 



Vernalis East Indies Green do 



Conspersus East Indian Ocean Poppy • • • • do 



Ochroleucus • • • • Ditto Whitish brown 



Stellatus Ditto Starred • • • do 



Spengleri Spengler's • do 



Costatus Ribbed • • • • do 



Inaequalis Mozambique Unequal • • do 



Regius Royal do 



Verrucosus ...... East Indian Ocean Warty do 



Radiatus •••••• •• West Indies, Mauritius • Radiated "do 



Viridis New Zealand Green • • • • do 



Fanulum Pernambucca Pagoda • • • do 



Strigosus Morocco Black lipp'd do 



Dubius Doubtful • • do 



Depressus Depressed • do 



Laevis - . - • Smooth • • • do 



Groenlandicus ■ • Norway, Greenland Greenland do 



Matcns Britain Tnberculateddo 



